/Engine/Plugins/Runtime/nDisplay/Source/DisplayCluster/Public/Render/Viewport/IDisplayClusterViewportManagerProxy.h
Find viewport render thread proxy object by name [Rendering thread func]
[IDisplayClusterViewportProxy](API\Plugins\DisplayCluster\Render\Viewport\IDisplayClusterViewportProxy) * FindViewport_RenderThread ( const [FString](API\Runtime\Core\Containers\FString) & InViewportId ) const